Multiple Fano resonances in metal–insulator–metal waveguide with umbrella resonator coupled with metal baffle for refractive index sensing |
(a) Transmission versus wavelength of the structure calculated byFEM method (blue solid line) and MICMT method (red circle), and (b) transmission versus wavelength of the proposed structure with only metal baffle (green solid line), only USR & VCS (blue dash–dot line), and coupled system (red dotted line) studied by COMSOL(FEM) simulation. |